typeck.c (cp_build_compound_expr): Require RHS to have a known type.

typeck.c (cp_build_compound_expr): Require RHS to have a known type.

	cp/
	* typeck.c (cp_build_compound_expr): Require RHS to have a known
	type.
	* class.c (resolve_address_of_overloaded_function): Use
	OVL_CURRENT for error message.
	(instantiate_type): Forbid COMPOUND_EXPRs and remove code dealing
	with them.  Do not copy the node.

	testsuite/
	* g++.old-deja/g++.other/overload11.C: Adjust expected errors.
	* g++.dg/template/overload9.C: Likewise.
	* g++.dg/ext/ms-1.C: New.

From-SVN: r147125